Account Change

Hallo i want to tell you a bug. I want to play my last Ghost Mode Game in Metro for the Daily Mission and i joint the romm and press Join Game... it load and than the roun started but i play with another account, it wasn´t my account and i had other weapons. I had a Pumpgun XM1014-A, Shoval, Anaconda and 3 throwns! Than i die and in the next round i only could watch the game. Than i look in the Info (where you can watch the K/D ingame) and there stand not my name it was an other account which was ingame too. I left the room and it was my account and i dont have the weapons xD... its a very big game bug and please fix it...
Sorry for my bad englisch, im german